Powder metallurgy processes – Powder metallurgy processes with heating or sintering – Powder pretreatment
Patent
1996-07-18
1997-11-18
Jordan, Charles T.
Powder metallurgy processes
Powder metallurgy processes with heating or sintering
Powder pretreatment
419 33, 419 36, 419 37, 419 38, 419 47, 419 54, 419 58, B22F 312
Patent
active
056897960
ABSTRACT:
The method of the invention is concerned with the manufacture of a molded copper-chromium family metal based alloy article which involves the steps of injection-molding a mixture of copper powder, a chromium family metal powder, an iron family metal powder and a thermoplastic organic binder made up of a polymer binder and low molecular binder in a ratio by volume of 5:1 to 1:1, dewaxing a molded body formed by the injection-molding by heating in a reducing atmosphere, and then sintering the dewaxed molded body at 1,100.degree. to 1,450.degree. C. in a reducing atmosphere. According to this method, molded articles having a high dimensional accuracy and high density can be provided.
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ASM Handbook, (ASMH), vol. 7, Powder Metallurgy, 1984, pp. 316-321.
Akiyoshi Naoyoshi
Hamada Takeo
Kasai Takao
Ogasawara Naoto
Citizen Watch Co. Ltd.
Jenkins Daniel
Jordan Charles T.
Toho Kinzoku Co., Ltd.
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